ellerbeck



April 1, 1958 G. c. ELLERBECK 2,828,913

BACK-TRANSFER MECHANISM Filed Sept. 16, 1952 8 Sheets-Sheet l NVEN 0 ATTORNEY April 1, 1958 G. c. ELLERBECK BACK-TRANSFER MECHANISM 8 Sheets-Sheet 2 Filed Sept. 16, 1952 GRANT C. ELLERBECK v: on M Aprii 1, 1958 c, ELLERBECK 2,828,13

BACK-TRANSFER MECHANISM Filed Sept. 16, 1952 8 Sheets-Sheet GRAN;- g, @E

April 1958 G. c. ELLERBECK 2,828,913

BACK-TRANSFER MECHANISM Filed Sept. 16, 1952 '8 Sheets-Sheet 4 :3 'fimmamw M- INVENTOR.

TTQEWE V Filed Sept. 16, 1952 8 Sheets-Sheet 5 K a 555R.

147' TUBA/E 1" April 1958 G. c. ELLERBECK 2,828,913

BACK-TRANSFER MECHANISM Filed Sept. 16, 1952 8 Sheets-Sheet 6 April 1, 1958 G. c. ELLERBECK BACK-TRANSFER MECHANISM 8 Sheets-Sheet Filed Sept. 16, 1952 A? T LLE BECK 6 AN 64 NVfi/TOR.

A TTUNE Y April 1, 1958 e. c. ELLERBECK BACK-TRANSFER MECHANISM 8 Sheets-Sheet 8 Filed Sept. 16, 1952 ATTORNEY 2,828,913 Patented Apr. 1, 1958 innit z,s2s,91s

BACK-TRANSFER MECHANHSM Grant C. Eilerheclr, San Leandro, Qaiiii, a-" nor to Frisian, line, a corporation of (Zahrornia This invention relates to a calculating machine, and more particularly to a transfer mechanism of the type disclosed in my Patent No. 2,714,989, issued August 9, 1955, which is operable selectively to transfer values from the accumulator of a calculating machine to a duplex register in which grand totals can be accumulated, or to a constant factor device for the keyboard.

One of the primary objects of my invention is to provide a mechanism selectively operable to automatically align preselected orders of the accumulator register with the keyboard of the machine, and thereby with the back transfer device. it will be understood that in most of the conventional calculating machines the accumulator register contains approximately twice as many Orders as the selection mechanism (conventionally about ten orders in the selection mechanism and about twenty in the accumulator). It is obvious that in such a machine, it will often be desirable in storing grand totals in the duplex register, or in transferring an accumulator value back to the constant factor mechanism for use in the keyboard, to use oniy the ten highest significant digits of the accumulator value, or to work around a fixed decimal point by dropping off insignificant values, and the like. Heretofore, in back transfer or duplexing devices, in which one register or the selection mechanism contained fewer orders than the accumulator register, it was necessary to manually set the accumulator in the desired ordinal position for the back transfer operation. As indicated, the primary object of my invention is to provide means for selectively tabulating the accumulator to a desired ordinal position prior to the transfer operation.

Another important object is to provide an improvement in the machine shown in my Patent No. 2,714,989, issued August 9, 1955, whereby the transfer operation from the accumulator into the storage device, or duplex register, automatically is caused to take place in a predetermined ordinal position of the register.

Another important aspect of the present invention is to ide a back, or interregister, transfer machine, such as ved in my said copending application, with two keys operable to initiate a back transfer operation, one of which is operable to effect a transfer in the then carriage posi tion; and the other of which is operable to first shift the carriage to a predetermined ordinal position and then automatically initiate operation of the transfer mechanism.

These, and other, aspects of my invention will become apparent from a consideration of the following description of the preferred embodiment shown in the drawings, in which:

Fig. 1 is a longitudinal cross-sectional view through the keyboard of the machine described in the abovementioned patent.

Fig. 2 is a partial left side elevation of the right frame of a conventional calculating machine of the type shown in the patent to Friden, No. 2,229,889 issued January 28,

1941, showing some of the conventional mechanisms mounted thereon.

Fig. 3 is a detail of the front end of the frame plate shown in Pig. 2, Figs. 2 and 3 taken together forming a left side view of substantially the entire frame plate.

Fig. 4 is a right side elevation of the frame plate shown in Fig. 2, showing other mechanisms mounted thereon.

Fig. 5 is the forward end of the plate and mechanisms shown in Fig. 4, the two views taken together forming a right side view of this frame plate.

Fig. 6 is a plan view of certain elements of the calculating machine mentioned, showing particularly the shifting and clearing mechanisms thereof.

Fig. 7 is a detail of the forward end of the clearing control mechanism, showing particularly means for disabling that mechanism when desired.

Fig. 8 is a partial rear elevation of the machine with the cover removed, showing particularly the left side thereof and the means for shifting the carriage from one ordinal position to another.

Fig. 9 is a rear elevation of the mechanism operable to effect power clearance of the carriage registers, and in effect constitutes the right-hand extension of Fig. 8.

Fig. 10 is a cross-section of a portion of the carriage of my machine, showing particularly means for controlling additive or subtractive digitation in said machine.

Fig. 11 is a left side elevation of the left frame plate of the preferred embodiment of my invention, and shows only that portion of the control mechanism mounted thereon which is operative to effect a transfer from the accumulator register to the constant factor mechanism and duplex register of my said patent above-mentioned, and in that respect corresponds to Fig. 9 of said patent.

Fig. 12 is likewise a left side elevation of the left frame plate showing the mechanisms of the present invention which are superposed over those shown in Fig. 11 (or the transfer control shown in Fig. 9 of said patent).

In view of the fact that the present invention comprises an improvement on the machine shown in my Patent No. 2,714,989, issued August 9, 1955, and in effect adds a control member for providing automatic tabulation of the register carriage to a predetermined ordinal position as the first phase of a transfer operation, it is deemed unnecessary to redescribe that invention in full. It can be noted, however, that Fig. l of this application is substantially the same as Fig. 1 of said patent. The parts shown therein need only a brief description, for it will be understood that, insofar as such mechanisms are concerned, they are not claimed herein and are considered conventional for the purposes of the present invention.

Selection mechanism.Such a machine will contain a plurality of value toys 35 which are depressible to select values for insertion in the register dials 87 (shown in Fig. 10). key stem thereof, engaging a cam face 45 on a selection slide 46, translates the slide forwardly a differential amount corresponding to the key depressed. The selection slides 56 in turn are connected to selection gears 51 slidably mounted on square shaft 52. Translation of the selection gears 51 places them in operative position with respect to stepped drum actuators 60 mounted on actuator shafts 61 which, through power shaft 63 and actuator shafts 61, are given a complete rotation with each machine cycle of operation, whereby the square shaft 52 is differentially rotated according to the setting of the keyboard, in each cycle of operation.

A gear spool 7ft (shown in Fig. 10) is slidably mounted on square shaft 52, adjacent the rear end thereof, and carries a gear at each end-a plus gear 71 being mounted on the front end of the spool and a minus gear 72 being mounted on the rear end thereof. The plus and minus Depression of a key 35, through the pin 44 on the in Fig. 4.

BA gears 71 and '72 are adapted to engage an accumulator gear 85 mounted on the lower end of an accumulator shaft 86 upon movement of the spool 79 in either direction from its centralized position shown in Fig. 10. The spool is moved by a conventional gate 73 mounted on arms 74 which are rigidly mounted on a gate setting shaft 75. The shaft '75 and spool 76 are resiliently held in the disengaged position shown by a suitable centralizer, shown If the spool 70 is translated to either its forward or rearward positions, it will engage the accumulator gear 85, and, when the square shaft 52 is differentially rotated, the shaft 86 will be rotated in one direction or the other for a like amount, to enter the value set in the keyboard into the register dials 87.

Keyboard clean-It is conventional in machines of this type to latch a manipulated key in its operative position and to provide means for clearing the keys of the keyboard when desired. For this purpose it is conventional to provide a latching slide 43 associated with each order of value keys 35, which slides are resiliently biased toward the front of the machine. These latches 43 are adapted to engage notches 42 in the stem of a depressed key, thereby locking the key in its depressed, or operative, position. A depressed and latched key can be released by translating the latching slide rearwardly, as by depression of an ordinal zero key 37 (Fig. 1). Alternatively, all of the ordinal latch slides 43 can be operated simultaneously, as by depression of the keyboard clear key 53 (shown in Figs. 3 and Depression of the keyboard clear key 53 rocks a bellcrank 54 (Fig. 5) the vertical arm of which lies in front of an ear 55 of a keyboard clear bail 56. The keyboard clear bail 56 is fixedly mounted on a transverse shaft 487 journalled in the right and left side frame plates 21 and 22. The bail 56 (see particularly Fig. 3) carries a long bracket 53 which is adapted to engage the turned-down ear 59 on the forward end of the latch slides 43. Thus, rocking of the bail 56 (counter-clockwise in Fig. 3, clockwise in Figs. 1 and 5) causes the bracket, or ear, 58 to engage the ears 59, thereby translating the latching slides 43 rearwardly to unlatch the depressed keyboard keys. The keyboard clear bail 56 is resiliently urged forwardly by any suitable means such as spring 65.

The clear bail may also be operated by an add key mechanism such as is shown and described in the patent of John L. Moody et al., No. 2,714,986 issued August 9, 1955, which is operative to translate the floating link 66 (see Fig. 5). The mechanism which controls the operation of this link is not here pertinent and will not be described. However, it can be noted that its operation is automatically disabled in certain machine operations by depression of the forward end of an arm 67, an car on the forward end of which engages the nose 68 of the floating link 66, thereby depressing it so that it cannot engage the car 55 of the clearing bail.

Carriage shift-It is conventional in calculating machines to mount the register dials 87 (see Fig. in a suitable carriage 32 which is shiftable transversely across the machine to enable operation in selected orders of the register. The carriage contains a hollow bar, or frame, 33 upon which most of the carriage mechanisms are mounted. This carriage is shiftable by power under the control of manually operated keys not pertinent to this invention and not here shown, and also in certain automatic operations including the automatic tabulation of the carriage. The mechanism for shifting the carriage is shown particularly in Figs. 6 and 8, and is fully shown and described in the patent issued to Carl M. Friden, No. 2,380,642, issued on July 31, 1945.

The movement of the carriage is controlled by a left shift clutch 292 and a right shift clutch 294 of conventional construction, which are mounted preferably on the two rightmost actuator shafts 61. In the machine shown in this embodiment, it is conventional for these actuator shafts to be constantly engaged with drive shaft 63 through conventional miter gears, whereby the actuator shafts are given a complete revolution in every cycle of every machine operation. The operation of left shift clutch 292 is controlled by movement of a shift rod 293 resiliently urged toward the front of the machine by a suitable spring 249. Similarly the right shift clutch 294 is under control of a right shift rod 295 similarly urged toward the front of the machine by a suitable spring 241. Rearward movement of the clutch rods 293 and 295 operate the shift clutches 292 and 294, respectively, to connect the actuator shafts 61 to the driving mechanism which includes a conventional gear train so arranged as to drive the shift drive plate 296 in either direction. The drive plate 296 is provided with four equally spaced drive pins 297 which are adapted to engage the notches 298 (shown in Fig. 8) of the shift rack 299 mounted on the rear side of the carriage frame bar. Thus, rearward movement of the left shift rod 293 causes the carriage to be shifted to the left while movement of the shift rod 295 causes the carriage to be shifted to the right.

The operation of the left shift clutch rod 293 is controlled by various means, one of which is the rocking of shaft 319 (Fig. 6). The shaft 319 carries an arm 320 rigidly secured thereto. A pusher link 321 is pivotally mounted on the arm 320 and has a shoulder, not shown, which engages the front end of the push rod 293, the link 321 being resiliently urged into engagement with the bar 293 by a suitable tension spring 242, as shown. Similarly the right shift rod 295 can be operated by the rocking of a sleeve 322 upon which is rigidly secured an arm 323. A pusher link 324 is pivotally secured at its front end to the arm 323 and at its rear end engages the rod 295. This link, as was true of link 321, is resiliently urged into engagement with the push rod 295 by a suitable tension spring 243.

Register clearing-it is conventional in machines of this kind to provide means for clearing the registers by power. invention, it is conventional to clear the register dials 37 by means of mutilated gears 91 (see Fig. 10) mounted on the dial shafts 86. Associated with the gears 91 is a rack 92 which, upon longitudinal movement thereof, engages the mutilated gears 91 displaced from their zero positions and returns the register dials to a clear, or zero, position. Movement of the rack is secured by rocking of the arm 117 mounted on a slide 115. The movement of this slide will now be described.

The power drive for the clearing mechanism is secured by mounting a suitable clutch 93 (shown in Fig. 6) of conventional construction, to the next to the leftmost actuator shaft 61. Engagement and disengagement of the clutch 93 is secured by movement of the push rod 94- which is normally biased toward the front of the machine by a suitable compression spring 95. A pusher arm 96 (see Figs. 6 and 7) engages the forward end of the push rod 94. The pusher arm 96 is pivotally secured to an arm 97 which is rigidly mounted on a transverse shaft 153. Thus, rocking of the shaft 158 and the arm 97 translates the pusher arm 96 rearwardly to move the rod 9d, and thereby move the clutch 93 into engaging position. The clutch 93 is adapted to operatively 0on nect the actuator shaft "1 to a clear sleeve 99 which is journalled in the rear frame plate 25 and a bracket 194- (see also Figs. 9 and 10). The sleeve 99 ca conventional clear cam 1.16, which is given a si cycle of rotation when the clutch 93 is moved to en ing position. Associated with the cam 11% is a follo roller 111 rotatably mounted on an arm 112 that is pivotally mounted on a back frame plate 25. The upper end of the arm 112 is provided with a slot 1&3 which embraces a roller .114 mounted on the slide 115, suitably supported from the rear plate 25 by means of cam brackets 129. The slide 115 and arm 112 are normally held in their leftward position (to the right in Fig. 9)

t by a suitable spring 116. The slide 115 is provided with In the machine shown as an embodiment of my The slide 115 also carries camming projections 119 on' the rear side thereof, which cooperate with cam edges of the brackets T29. The clearing mechanism is held in its full-cycle position by a suitable centralizer, such as the spring-urged arm 123 engaging a corresponding flat on the clearing sleeve 99.

it will be obvious that as the clutch 93 is moved to its clutch engaging position, the cam 110 will be given a full cycle of rotation, thereby rocking the arm 112 and translating slide 115 (first counter-clockwise and then clockwise in Fig. 9). Movement of the slide 115 toward the left in Pig. 9, causes the cams 119 to engage the opposing faces of the brackets 120, thereby forcing the slide and its integral arm 117 inwardly (counterclockwise in Fig. 10) and causing the tip of the arm to engage one of the teeth 12.1 in the rack d2. Thus, the rocking of the arm 112 and translation of slide 115; causes the rack 92 to be translated for a clearing stroke. it will be obvious that other means for clearing the register G7 in any carriage position could be used, and it is to be understood that the mechanism here shown and described is merely one embodiment of such a clearing mechanism.

Storage mechanism and inzerregister transfers.-My Patent No. 2,714,989 above-mentioned describes a mechanism for (l) storing a keyboard value which is effective, when desired, to set a desired constant factor in the keyb rd, and (2) a duplex register, and means for transferring values from the accumulator register into both said mechanisms. The mechanism therefor is shown particularly in Fig. l, and, as it is fully described in sai copending application, it needs only brief mention here. The constant factor, or value storage, mechanism comprises a longitudinal shaft 215 associated with each order of value keys 35. A number of helically arranged pins 217 are mounted on the shaft 215, and so spaced along the shaft that the angular position of the shaft (representative of the value to be stored therein) places a pin in operative relationship with its associated value key. When the shaft 215 is translated forwardly, the pin representative of the value stored therein will engage a bellcrauk 2. 3 associated with the corresponding key thereby re -ng the bellcrank and depressing the ke to its latched, or operative, position.

l also prefer to provide a duplex, or storage, register "ed in the forward portion of the machine and ig a plurality of storage dials 237. These dials i are connected to the constant factor shaft 215, and to a drive shaft 245 by suitable gearing, as shown. The

"1, which are operable to set both the storage dials 23? and the constant factor shafts 21S, extend iongitudinahy in the machine adjacent the corresponding order of the keyboard. Each such shaft 245 is provided with a ic rigidly secured to the rear end thereof. pi n meshes with a similar pinion 25'? mounted on a sleeve 23s rotatably mounted on a cylindrical por on of the square shaft 52. The sleeve is also provided with a clutch member 26% adapted to be engaged by the tooth of a clutch member 261 slidably, and non-rotatably, mounted on the square shaft 52. The p sition of the clutch member an, in either operative or inocerat' tics, is controlled by an arm 264 isverse shaft 265.

the clutch members 261, 26% are p t' n, the differential rotation of shaft 52 hrough the drive shaft 245 to the c and the constant factor shafts A v ,lue can oe entered directly from the keyboard, as described in said application, but ordinarily a value stored therein is the result of an interregister transfer in which the value standing in the accumulator register dials 87 is transferred to the storage dials 2.37 or constant factor shafts 235. This is accomplished by simultaneously rocking the gate shaft forwardly to efiect a meshing engagement between the accumulator gears 35 and the minus gears 72 and the rocking of clutch shaft 265 to effect engagement of the clutch members 261, 260; and thereafter operating the clearing mechanism previously described to clear the register 87. By this operation the value standing in the register before clearing, is transferred to the storage dials 237 and the constant factor shafts 215.

Dividend entry mechanism.I prefer to utilize the conventional dividend entry mechanism of the present commercial Friden calculating machine to secure the automatic tabulation of the carriage to the proper ordinal position. This mechanism is essentially that shown in the patent to Friden No. 2,403,273, issued luly 2, 1946, as modified by the patent of Anthony B. Machado, No. 2,7l4,990, issued August 9, 1955. This mechanism, which is conventionally operated by depression of a dividend entry key 15d (Fig. 4), operates the clearing mechanism preliminary to a division operation and effects entry of a dividend set in the keyboard into the accumulator in any selected ordinal position, while suppressing the usual count made in the revolutions counter during the entry of a factor into the accumulator. Normally, when using this mechanism, the operator sets the dividend into the keyboard and depresses the dividend entry key 150. The depression of this key operates mechanisms performing the programmed steps in the desired sequence: to first shift the carriage to the extreme left-hand position; to clear both the accumulator and counter registers while in such position; to then enable a power shift of the carriage to the right to a selected ordinal position; and, finally, when the carriage reaches that position to automatically enter the dividend once into the accumulator. This mechanism will be modified in the present invention to prevent the clearing of the registers while in the extreme left-hand position, when, and only when, the operation is initiated by the mechanism of my present invention. The fourth and last step (the entry of the keyboard value into the register) does not have to be disabled because, as will be explained hereafter, the keyboard and selection mechanism will be cleared upon initiation of the back transfer operation. Thus the final step of entering a keyboard value will be completely idle, as no value stands in the selection mechanism. Therefore it is necessary to modify operation of the conventional dividend entry mechanism only to the extent of disabling the clearing mechanism during the ordinary dividend entry operation.

The dividend entry key 15% (see Fig. 4-) is mounted on a long stem 15f, which is resiliently urged to its raised position by a conventional spring, not shown. The stem can be latched in its depressed position by a conventional latching slide 152. The lower end of the key stem 151 is provided with a slot 167 which embraces a pin 1.63 carried by the rearwardly extending arm of a bellcrank 3.53. This bellcrank is suitably mounted on the right frame plate, and its lower arm is provided with a suitable stud adapted to engage the camming lever upon depression of the key 15%. The camming lever T54 is rigidly secured to a transverse shaft 155 which extends across the machine to the left side plate, as shown in Figs. ll and 12. Thus, depression of the dividend entry key lS-l is operative, through the linkage shown, to rock the shaft 155 (clockwise in Fig. 4 and counter-clockwise in Figs. 2 and 12).

Among other things, the rocking of the shaft 155 is operative to engage the main drive clutch and close the motor switch to drive the machine. This is secured by means of an arm 156 (see Fig. 2) mounted on the shaft 155 immediately to the left of the frame plate 21. A

stud on this arm engages one arm of a three-armed lever 157, pivotally mounted on a transverse shaft 158. One arm of the lever E57 lies behind a stud 159 which connects the switch control link 165 to the lever 161 (see also Fig. 4). Thus, the rocking of the shaft 155, through arm 11% and three-armed lever 157, pulls the switch control link forwardly to switch closing position (the switch not being shown herein) and also rocks the lever Eel which, by means of link 12 and clutch pawl 163, controls operation of the conventional clutch 164. Thus, the rocking of the shaft 155 is, among other things, operalive to close the motor switch and thereby drive the machine motor, not shown, and to cause engagement of the main clutch $.64, whereby the machine is driven until the key stern 151 is released from its depressed position by operation of the latch slide 352 at the end of the dividend entry operation.

The rocking of the three-armed lever 157 is also operable to disable the keyboard clearing mechanism normally controlled by the add key, not shown and described herein, but which is conventional in machines of this kind. This is secured by means of one of the arms of the threearmed lever rocking a lever T55 (see Fig. 2) the forward arm of which carries a pin extending through a suitable aperture in the frame plate to engage the rear end of a lever (see 4 and 5). Thus, the rocking of the three-armed lever causes the forward end of the lever I165 to rise, thereby rocking the lever Z66 (counter-clockwise in Figs. 4 and 5). The forward end of the lever 166 overlies a stud 69 on the floating clear link 66, whereby rocking of the lever 166 depresses the floating link 66 so that it is no lon er operative to engage the car on the clear bail 56.

The depression of the key stem 151 is also utilized to set the power-operated mechanism for operating the left shift clutch, and normally the clearing clutch also, to shift the carriage to the extreme left-hand position preparatory to clearing and tabulating the carriage to the proper position. The mechanism for securing these operations is shown particularly in Fig. 2. It is seen that a lever 169, which is keyed to the shaft 155, underlies the pin 168 carried by the bellcrank 3.53 and embraced within the slot 167 in the lower end of the key stem 151. Thus, depression of the key stem rocks both the bellcrank 153 and the lever 169 (the lever rocking counter-clockwise in Fig. 2). The shaft 155 extends to the left side of the machine, and has rigidly mounted at its left end the arm 9'7 (seen in Fig. 7) which supports the clear pusher link 96. Thus, among other things, the rocking of shaft 158 from the depression of the dividend entry key normally enables the clear clutch 93 previously described. it can be mentioned at this point that this clearing of the regi: 'er will be disabled by lifting the link 96 out of engagement with the push rod 94 in operation of the dividend entry mechanism by my present invention, as will hereafter be described.

The rocking of the shaft 158 is also utilized to control the engagement of the left shift clutch 292 and thereby shift the carriage to the extreme left-hand position. As shown in Fig. 7, the shaft 158 carries an arm rigidly mounted thereon. This arm 170 pivotally supports a pusher arm 1711, which is resiliently urged by a suitable spring T72 downwardly into engagement with a pin 173. The pin 1'73 is mounted in an arm E74 (see Fig. 6) integral with a sleeve r75 loosely mounted on the shaft 319.

The other end of the sleeve carries an arm 176 upon which is riveted a long pin 17]. The pin 177 lies against the forward end of the left shift push rod 293, so that the rocking of the sleeve (counter-clockwise when viewed from the right) is operative to push the rod 293 rearwardly and cause en agement of the left shift clutch 292. Thus the rocking of shaft 158, from the depression of the dividend entry key 15%, is operative through the linkage just described, to cause engagement of the left shift clutch. The parts thus adjusted are latched in their operative positions by latch 152 acting upon key stem 151, so that the carriage will be shifted to the left to the extreme left-hand position, whereupon the registers will be cleared and the left shift will be terminated and a right shift enabled. The means for terminating the left shift of the carriage will now be described.

An override pawl 180 (see Fig. 8), is rockably mounted on the right end of the shift rack 299. It is seen that as the carriage is shifted to the extreme left-hand position, shown in this figure, the attempted shifting of the carriage an additional step to the left (to the right in this figure) will cause one of the pins 297 to engage the lower edge of the override pawl 180, rocking it upwardly (counter-clockwise in this figure). The right end of the override pawl overlies an ear on a long geniculated lever 331 pivoted on the rear frame plate 25. This lever 1S1 overlies a rearwardly extending arm of a bellcrank 182 pivotally mounted on the transverse digitation control shaft 75. The vertical arm of the bellcrank 182 pivotally supports the rear end of a forwardly extending link 133 (see also Fig. 6), the forward end of which is pivotally supported by an arm 184. The arm 184 is pinned, or otherwise rigidly secured, to a transverse shaft 135, which obviously is rocked upon the rocking of the override pawl 180. The rocking of the shaft 185 is utilized to disable the left shift clutch and the clear clutch. This is secured by a plurality of arms rigidly mounted on the shaft 185: arm 136 which extends forwardly and underlies the pusher arm 321; the arm 187 which underlies the pusher arm 171; and arm 188 which underlies pusher arm 96. Therefore, the rocking of shaft 185 (clockwise when viewed from the right) raises each of these three arms, each of which is operative to lift the respective pusher from its engaging position. It will be understood that both the left shift push bar 293 and the clear clutch push bar 94 will thereupon be urged forwardly under the pressure of their respective springs. Thereafter the operated pusher arms 321 or 171 and 96, will ride upon the upper surface of the respective push bars and are, therefore, no longer effective to control operation of their respective clutches. However, at the termination of the dividend entry operation, the respective shafts will be returned to their normal positions and the respective pusher arms will thereupon properly engage the respective push bars.

The depression of the dividend entry key 150 is also operative to block out the operation of the counter actuator, not shown, so as to prevent entry of values into the counter register, not shown, during the normal dividend entering cycle; and also to condition suitable mechanism for effecting a right shift of the carriage at the termination of the left shift just described, and terminating such right shift of the carriage when the carriage reaches the desired ordinal position. These operations can be secured by operation of a two-armed lever 388 (shown in Fig. 2) which is pivotally supported on the side plate 21 by any suitable means, such as screw 389. The forward end of the lever 388 is provided with a suitable stud which engage the lower end of the key stem 151, whereby the lever is rocked (clockwise in Fig. 2) upon depression of the dividend entry key 150. The rear end of the lever 388 is provided with a suitable roller which engages one arm of a bellcrank arm 390 which forms one end of a bail 391i rotatably mounted on a transverse shaft 397. The other arm of the bellcrank 390, not clearly shown in the drawings, by means of a pin and slot connection rocks a counter block out arm 392 (clockwise in Fig. 2) and holds it in the rocked position until the control key stern 151 is released. A counter block out slide 393 is pivotally secured to the upper end of the lever 392, and operates in known fashion to block out the operation of the counter actuator throughout the dividend entry operation, i. e., until the operation is complete and the key stem 1551 released from its depressed position in which it is held by latch 152. The other end of the bail 391 is provided with an arm 394, to the free end of which is pivotally secured a link 395. The rear end of this link is supported upon a suitable stud 463 carried by the arm 467 of bail 466, also rotatably mounted on shaft 397. The rear end of the link 395 is provided with a suitable nose 3% so designed as to underlie the lower end of the bellcrank 18.1 which is operated by the override pawl 189, when the dividend entry mechanism is latched in its operative position just described. In such a position the rocking of the override pawl, and the depression of the geniculated lever 181, not only operates the bellcrank 182 which, as heretofore described, is effective to terminate the left shifting operation, but it also rocks the link 3%" and through it the arm 467.

The bail 466 is normally urged to its inoperative position shown in Fig. 2, by suitable spring 471', the depression of the lever 181 being operative to rock the bail (counter-clockwise in Fig. 2) to its operative position. However, once the bail 466 is rocked to its operative, or adjusted, position it is latched there by means of an arm 472 thereof engaging a latch 473, the latch being urged rearwardly (counter-clockwise in Fig. 2) by suitable spring means. it can be mentioned at this point that the latch 473 is not released until the tabulation control slide 491 is depressed when the carriage reaches its selected position.

A live arm 469 is pivotally mounted on the arm 467 just described, and is provided with a rearwardly extending nose which bears against the plate 195 forming a portion of the right shift clutch control bar 295. The two arms, 467 and 465, are resiliently urged to their retracted position by a suitable spring 470. Thus, the arm 469 tends to follow the rocking of arm 467, upon operation of the override pawl; the spring permitting the arm 469 to yield until the end of the left shift cycle. At that time an interlock, not shown herein, permits the engagement of the right shift clutch, whereupon the spring 470 pulls the arm 469 (counter-clockwise in Fig. 1) to push the plate 195 rearwardly and thereby engage the right shift clutch 294.

The latching of the bail 466 in its operative position, as just described, is effective to condition the dividend entry mechanism for terminating the shift to the right as soon as the carriage reaches its desired ordinal position, and thereupon to enter a dividend factor standing on the keyboard into the accumulator register 87. The bail 466 is formed with an integral arm 474 (see in both Figs. 2 and 4). A link 475 is pivotally secured to this arm 474, extending forwardly to an arm 476 loosely mounted on the tabulating slide 491. Thus, the rocking of the bail 466 (counter-clockwise in Fig. 2), upon the operation of the override pawl 184) to depress the bell crank 181, pulls the link 475 and the lower end of arm 476 rearwardly. In this position the lower end of the arm 476 overlies an ear on a latch releasing arm 477, which is also pivotal- 1y mounted on the shaft 397. Thereafter, when the slide 491 is depressed by the carriage shifting into the predetermined ordinal position, as hereinafter described, it is operative to rock the latch releasing arm 477 downwardly. The arm is provided with a cam, not shown, which, when the arm is rocked, is operative to rock the trigger latch 478 (shown in Fig. 4) to its disengaging position (counter-clockwise in this figure). This rocking of the latch 478 permits the trigger 479 to rock under the pressure of its relatively strong spring 490. Rocking of the trigger 479 (counter-clockwise in Fig. 4) is operative to rock an arm 445, a stud 446 on the lower end of the arm being engaged by the upper end of the trigger 479. Normally the lever 445 is clutched to the digitation control shaft 75, whereby the rocking of the arm 445 is operative to rock the shaft 75 (clockwise in Fig. 4) to its additive position wherein the add gears 71 (see Fig. engage the accumulator gears 85. Thereupon any value standing in the keyboard of the machine is added into the accumulator register 87, the machine being held in opera- 10 tion for a single cycle after the depression of the tabulating slide 491 by aconventional linkage, not here shown. It can be mentioned at this point that the rocking of the lever 445 is also operative to release the latch 152, the upper end 447 of the lever 445 engaging a pin on the latch 152, as shown. Thereupon the dividend entry key is released and permitted to rise under the force of its spring, not shown. The unlatching of the dividend entry key stem 151 permits the mechanisms con-' trolled thereby to return to their normal position.

The tabulating slide 491 is operated when the carriage shifts to a preselected ordinal position. It is conventional in a machine of the kind shown in this embodiment, to provide a series of tabulator keys 493 mounted in the front rail of the carriage 32, which keys are depressible and may be latched in a depressed position. The lower end of a depressed key, as the carriage is shifted to the preselected ordinal position, is operative to rock a lever 4'92 mounted in the frame of the machine (as seen in Fig. 2), thereby depressing the slide 491. The depressing of the slide 493. will obviously occur as the carriage is shifted either to the right or the left past the selected ordinal position. However, depression of the slide 4591 is operative to effect the entry of a dividend, and to terminate a carriage shift, only when the dividend entry mechanism including the bail 466, has been latched in it. operative position, which occurs after the rocking of the override pawl 18% at a time when the dividend entry mechanism is latched in its operative position. In all other conditions the arm 476, depending from the slide 491, is in its forward or inoperative position, and is there fore ineffective to control the operations described.

Back transfer c0ntr0Z.--It has been previously mentioned that the present invention relates to an improvement in my patent above-mentioned relating to a storage mechanism and means for effecting an interregister transfor from the accumulator register into the storage mechanism. This operation is under the control of a suitable transfer key 350 (see Fig. 11, which shows the mechanism shown in Figs. 8, 9, and 10 of the said copending application related to the controls for the transfer operation). The key 356 is mounted on the upper end of a key stem 351 which is supported for vertical sliding movement on the frame plate 22 by suitable pin and slot connections 352. The key stem 351 is urged to its raised position by a suitable spring 353 tensioned between an ear on the lower end of the key stem and a pin on the frame plate, not shown.

The key stem 351 carries a pin 354 which engages the upper edge of a horizontal arm of a bell crank 355, which in turn, is pivoted on the frame plate by any suitable means such as screw 356. The lower end of the vertical arm of the bellcrank 355 has a pin 357 which is embraced in a slot 358 on a transfer clutch control link 311). The forward end of the link 31d is supported by the lower arm of bellcrank 306, not here pertinent, and the rearward end is pivotally secured to an arm 312 which is rigidly secured to the transfer clutch control shaft 265. Thus, depression, of the key 356 rocks the bellcrank 355 to translate the link 314 forwardly, thereby rocking the shaft 265. The rocking of the shaft 265, is operative to cause engagement of clutch members 26% and 261 (Fig. l), to operatively connect the square shaft 52 (seen in Figs. 1 and 10) to the constant storage mechanism drive shaft 245. Subsequent differential rotation of shaft 52 will be operative to rotate the storage mechanism by a similar amount, thereby setting such value in the storage dials 237, and in the constant factor mechanism.

A lever 365 is pivotally mounted on the side plate 22 by any suitable means, such as screw 367. The upper end of this lever is provided'with a slot 366 which also embraces the pin 357 on the bellcrank 355. A res lient link 368a and 36817 is pivotally secured to the lever at an intermediate point on the latter, by a suitable stud 369. In the machine of my previous patent the link 368 was a single member. However, in the present invention, as the key 350 and arm 365 will be operated (as more fully described hereafter) during a machine operation in which the rear member 36812 is locked in its inoperative position, it is necessary that this link be yieldable. For this reason, in the present invention the linkage comprises a forward member 368a connected to the arm 365, and a rear member 368b. The two members are joined together by a pin and slot connection comprising pins 375 on rearward member 368]) engaging corresponding slots 376 on forward member 368a. The two sections are held in their retracted position by a relatively strong spring 377 tensioned between one of the pins 375 and a stud 378 on the front member 368a. To provide for operation of arm 365 when rear member 368]) is locked, the forward member is latched in its forward, or operative, position, the pin and slot connection above-mentioned permitting the forward member to move to such operative position. Then, when the condition which prevents operation of the rear member is removed, the force of the spring 377 is sufiicient to pull the rear member to its operative position, thereby operating the machine as was described in the said copending application.

The forward portion 368 of the link is latched in its operative position by any suitable latching means. In Fig. 11, I show a preferred form of latch which comprises a latch 6-4-9 slidably mounted on the frame plate 22 by any suitable means, such as pin and slot connections 643. The latch member is provided with a protruding stud 642 which is adapted to engage a notch 643 in the forward link 368a. The latch 64% is resiliently urged to its raised, or latching position, by a suitable spring 644 tensioned between the stud 6 32 on the latch and the upper pin of the pin and slot connection 541. it can be noted at this point that the latch will be positively released by a nose 645 (see Fig. 12) on the pin wheel 615 engaging the ear 646 on the upper end of the latch 6% as will hereafter be described, in the cycle following depression of the key This link 3-531) extends rearwardly to a point adjacent the rear of the machine, where it is pivotally mounted on a dependent arm 37%, by any suitable means such as pin 371. The arm is rigidly secured to a clear clutch shaft 103 which extends transversely across the machine. The shaft 153, at a point adjacent the clear clutch 93, previously described (see Figs. 6, 9 and 10), is provided with two arms: 1G2, which is loosely mounted on the shaft, and 1%, which is rigidly secured thereto by any suitable means, such as a pin. The rigidly mounted arm m5 is provided with a pin 1% (see Fig. 19) which is embraced within a slot M7 in the loosely mounted arm 102. The upper end of the latter arm is provided with a pin .ttll. which engages the annular slot in the clear clutch 93. It is thus obvious that the depression is also operative to rock the (counter-clockwise in Fig. ll), the rocking of which rocks the pinned arm 1G5 (clockwise in Fig. 10). The rocking of the arm M5 causes the simultaneous rocking of the arm 102 to position the clutch 93 in operative position to drive clear cam sleeve 99, and thereby effect a clearing operation as above described. The pin and slot connection 1%, lit? permits the clutch 93 to be engaged by other means previously described, without effecting a rocking of shaft 1%, but is so constructed and arranged that the rocking of the shaft N3 is always operative to engage clear clutch 33.

in this operation of transferring a value from the accumulator register dials 87 to the constant factor storage mechanism 225 and storage dials 237, it is necessary that the selection mechanism be entirely cleared. It will be obvious that if any key of the keyboard is depressed, one of the selection members 46 will be moved to an operative position, to effect a rotation of the digitation square shaft 52. However, during this back, or interclear clutch shaft 103 of the key 350 v register, transfer the minus gear 72 is automatically engaged with the accumulator gear 85, and the accumulator register cleared, thereby driving the shaft 52 differentially from the angular position of the dials 87. It is obvious that drive of the shaft 52 from these two sources would cause jamming of the machine, and it is therefore essential that the keyboard be cleared during the first part of the depression of the transfer control key 359. Such clearing can be secured through a lever 430 (shown in Fig. 11) pivotally mounted on the frame plate 22 by any suitable means, such as screw 481. The lower end of the lever is bifurcated at 432, which bifurcation embraces a stud 373 on the long link 368a. The upper end of the twoarmed lever 480 is pivotally connected to a forwardly extending link 4335 by any suitable means, such as pin 484.

The forward end (right end in Fig. 11) of the link is provided with a. slot 488 which embraces a pin 485 riveted or otherwise fixedly secured to the upper end of a twoarmed lever 486. The lever 486 is rigidly secured to the transverse keyboard clear shaft 437 already described. it will be recalled that on the interior of the machine, in front of the keyboard, the shaft 437 has the clear bail 56 fixedly secured thereto, whereby the rocking of the shaft is operative to translate all of the ordinal keyboard latches 43 rearwardly and thus release any keyboard value that might be standing on the keyboard.

Depression of the control key 3% and the consequent forward translation of link 3681? is also operative to connect the register dials 37 to the square shafts 52 (seen in Figs. 1 and 10). This can be secured in a variety of ways but a preferred form is shown in Fig. ll. A lever 330 is pivotally mounted at the rear of the left frame plate 22 by any suitable means, not shown herein. The arm 380 carries a pin 381 which is embraced in a camming slot 372 in the link 3681;. It is therefore obvious that the forward movement of the link 3581) is operative to rock the lever 380 (clockwise in Fig. 11). The lever 38!) is provided with a triangular camming slot 382 which embraces a pin 291 on an arm 2%. The arm 2% is rigidly secured to the digitation control shaft '75. The slot 382 is formed with a cam edge 387, so that the clockwise rotation of the lever 380 earns the arm 280 downwardly into the subtract position. Preferably the arm 380 is held in either adjustable position by a suitable detent, such as rocker arm 385 pivotally mounted on the frame plate 22. A pin 384 on the arm 385 is adapted to engage the upper edge 383 of arm 333*, the rocker being urged in a clockwise direction in Fig. 11 by a suitable spring 385.

Thus the rocking of the lever 365 also is operative to engage the minus gears 72 with the accumulator gears 35, so that the consequent clearing of the accumulator dials will transfer the values therein through the gears just mentioned into the square shaft 52. As previously mentioned, the depression of the key 35%? has already operated to cause engagement of the transfer clutch members 266), 261. Thus the differential rotation of square shaft 52 from the clearing of register dials S7 is operative to transfer the values in the accumulator dials into the storage mechanism.

In addition to the operations mentioned, which occur through depression of the transfer key 35ft, it is necessary that the main clutch 16d be engaged and the motor switch, not shown, he closed to drive the machine for a single cycle. This can readily be secured by means of an arm 566 (see Fig. 12) mounted on the switch and clutch control shaft previously described. A pin 567 is secured in the upper end of the arm 565. An arm 5% (as shown in Fig. 11) is pivotally mounted on a supporting bracket 515, as by stud 593. This arm 5% is adapted to rock pin 567 and arm 566 (and thus shaft 15$) when key 353 is depressed. The arm has a lower camming edge Stil engaging the pin 567 on arm 566. The arm 5% is rocked downwardly by the forward movement of the link 368a as the pin 369 connecting this link to lever 365 is extended to engage the upper cam edge 502 of the arm. Thus the forward movement of lint 368a and pin 369 rocks the arm downwardly (counter-clockwise in Fig. 11) and such movement of the arm cams pin 567 rearwardly to rock the shaft 155. As explained heretofore the rocking of the shaft is effective to close the motor switch and cause engagement of the main drive clutch.

Thus the depression of the transfer key 350 is operative to condition the machine for a transfer operation, the following steps taking place substantially simultaneously: The transfer clutch 260, 261 is engaged by the rocking of shaft 265; the clearing bail 56 is rocked to clear all values from the keyboard; the clear clutch control shaft 163 is rocked to cause engagement of the clear clutch; and the arm 380 is rocked to cause the rocking of the digitation control shaft 75 to shift the plus-minus spool 7b to its subtract position. Thereafter the depression of the key to its fully depressed position is operative to rock shaft 155 to cause the closing of the motor switch and the engagement of the main clutch to operate the machine through a machine cycle with the mechanisms conditioned as above described. Such a cycle of operation causes the motor to drive the clearing mechanism to clear the value from the accumulator register dials 87, which clearing operation, through the means described, transfers the value standing in such register dials into the storage mechanism.

Automatic tabulation in a back transfer operation The mechanism heretofore described has been, for the most part, conventional mechanism in the preferred form of machine to which my present invention relates. It will be understood that the depression of the transfer control key is operative to transfer the value standing in the orders of the dials 87 aligned with the constant storage mechanism, from the former into the latter. Values standing in either higher or lower orders of the register dials 37 are lost in the transfer process, there conventionally being fewer orders of constant factor storage mechanism than there are orders in the register. In many operations it is desirable that the values standing in certain selected orders of the accumulator register be transferred into the storage mechanism, or, which means the same thing, into the duplex register. In such cases it heretofore has been necessary to manually shift the carriage to the desired ordinal position to effectively transfer the values desired. My present invention is directed to the automatic tabulation of the carriage to a preselected ordinal position prior to the transfer operation. It will be obvious that this could be accomplished by having a separate key or mechanism to control the shifting of the carriage to the desired ordinal position, after which the key 35% would be manually depressed by the operator. I prefer, however, that the depression of a single key will automatically operate to control both operations in sequence and therefore show my invention in this form.

In the preferred form of my invention the new mechanism will be operated by a control key 51d (shown in Fig. 12), preferably placed laterally adjacent the transfer control key 35d. It has been mentioned before that Fig. 12, which shows the mechanism of my invention, is so arranged as to be superimposed over the transfer control mechanism of Fig. 11. it will be seen, therefore, that the transfer control key 35% lies immediately adjacent the new control key Slil (behind the control key 514 in Fig. 12). The automatic tabulation control key 51%) is mounted on a key stem Sll which is slidably mounted, by pin and slot connections 512, on a bracket 515 mounted on the frame plate 22. The key stem is resiliently biased to its raised, or inoperative, position by a suitable spring 513 tensioned between an ear on the lower end of the key stem 511 and an ear on the bracket 515, as shown.

It is desirable to provide a suitable interlock between the keys 35d and Sill to prevent simultaneous depression of both. Any suitable interlocking means could be pro vided, but one of the simplest comprises a two-armed lever 52f underlying the lower faces of the two key stems 351 and 511. This interlocking arm 52.1 is pivotally mounted by any suitable pivot member, such as screw 52d, laterally intermediate the two key stems; the pivot member 521 being affixed to a bracket 522, which preferably will be formed on bracket 515. By this means it is obvious that the depression of either key will rock the arm 5% to block depression of the other key.

A riveted stud, or pin, 514 on the key stem 511 engages the upper edge of the horizontal arm of a bellcrank 525, which is pivotally supported on the frame plate 22 by the screw 356, which also supports the bellcrank 355 associated with the transfer control key 350- the two bellcranks being separated by a suitable spacer 525, as shown in Fig. 11.

A forwardly extending link 52'') is pivotally supported on the lower end of the substantially vertical arm of the bellcrank 525, by any suitable means, such as stud 528. The forward end of this link is provided with a slot 529 which embraces a pin 4% on the lower arm of the clearing lever 49%. Thus, one of the first operations resulting from depression of the tabulating control key 510 is the translation of the link 527 forwardly to rock the clear lever :86 and thereby clear the keyboard value. It will be obvious that it is necessary to clear the keyboard before beginning operation, for, as will be explained hereafter, i prefer to use the dividend entry mechanism previously described to tabulate the carriage to the proper ordinal position. If a value were standing in the keyboard during this tabulating operation, such value would be entered into the register and thus destroy the value it was desired to transfer out of the register. Therefore, it is essential that either the keyboard be cleared at the start of operation or that the additive entry cycle coming at the end of the dividend entry operation be disabled. The former being the simpler, I prefer to use the means described to clear the keyboard as the key 510 is initially depressed. it will be obvious that the pin and slot connections 435, 4%, .8% and 529 permit operation of the keyboard clear mechanism by either of the control keys 3559 or Sid, or the other keyboard clearing mechanisms previously described, without effecting the setting of either or both of these control keys.

A rearwardly extending link 535 is pivotally connected at its forward end to the lower end of the bellcrank 525 by any suitable means, such as pin 536. The rear end of the link 5353 is pivotally supported, as by pin 537, on the lower end of an arm 545 which is rockably mounted on the frame plate 22 by any suitable means, such as screw 546. Normally the link 535 is resiliently urged rearwardly by a suitable spring 5338 tensioned between an ear on the link and a suitable stud on the frame plate, being translated forwardly upon depression of the key Slit. The forward translation of link 535 is operative to:

(a) Disable the clear clutch 93. I

(15) Condition a pin-setting mechanism for operation during the additive cycle of the dividend entry mechanism, the set pin being operative to initiate a transfer operation above described.

(0) initiate a divident entry operation by depressing the dividend entry key 1%.

(a) Disabling clear ciztich.-The forward translation of the link $35 is operative to disable the clear clutch, which is normally moved to engaging position upon depression of the dividend entry key 150. This can be accomplished by means of a roller 539 on the forward end of the link engaging a bent arm 565. The latter arm 565' is pivotally mounted on the stud $567 carried by arm which, as mentioned above, is rigidly secured to the shaft 1x55. The two arms are connected by a suitable spring 568 tensioned between a stud on each arm, as shown in Fig. 12. The roller, by engaging the angularly positioned upper edge 564 of the arm 555, is operative to cam the arm 565 downwardly. This movement of the arm 565 causes a shoulder 569 on the rearward end of the arm 565 to engage a pin 57% on an arm 571. The arm 571 is rigidly secured to a short transverse shaft 572, the right end of which is journalled on a suitable bracket 573 (as seen in Fig. 7). An arm 574 is rigidly secured to the right end of the shaft '72, and carries a long pin 575 engaging a cam face 575 on the forward end of a two-armed lever 576. This latter lever is pivotally mounted on the shaft 158, and its rear end is bent over, as at 577, to form an ear underlying the pusher link 96. it will be recalled that the shaft 155, on which the arm 566 is rigidly mounted, is rocked by the depression of the dividend entry key and retained in the rocked position until the dividend entry operation is terminated. The forward translation of the link 5355, in causing the rm 565 to engage the pin 570, thus enables the rocking of the shaft 155 and arm 566 to rock the arm 571 and the shaft 572 to which it is rigidly secured. The rocking of shaft 572, through arm 574 and pin 575, depresses the forward end of the lever 576, where upon the rear ear 577 lifts the pusher link 96 away from engagement with the clutch push rod 9 thereby disabling the clear clutch during the subsequent dividend entry operation.

(b) Condition pin-setting mechanism.Substantially simultaneously with the setting of the mechanism just described for the disabling of the clear clutch, the forward translation of link 535 conditions the pin-setting mechanism for an operation which will occur in the final additive cycle of the dividend entry operation. Means of effecting this purpose is shown in Fig. 12, and comprises a slot 547 formed in the lower end of the arm 545. This slot 547 engages a pin 555 in the upper end of a latching lever 556. This lever is pivotally mounted on the frame plate by any suitable means, such as screw 557, and is urged to its latching position (in a counter-clockwise direction in Fig. 12) by a spring 558 tensioned between a stud on the lower end of the lever and a stud on the frame plate. This latching lever 556 is provided with a shoulder, or notch, 559 at its upper end, which is adapted to engage a stud 589 on the forward end of the three-armed power lever 531. The threearmed lever 581 is pivotally mounted, as by screw on a bracket 583 riveted to the frame plate 22. This three-armed power lever, or trigger, is strongly biased (in a clockwise direction in Fig. 12) by a strong spring 584. It is thus seen that the forward translation of link 535, by rocking the arm 545 (counter-clockwise in Fig. 12) pulls the upper end of latch lever 556 forwardly, whereby the shoulder 559 on the latch releases the pin 58%. Thereupon the lever 581 rocks sufiiciently to prevent reengagement of the power lever by the latch arm 556, upon release of the tabulation control key 519.

The lever 581 is not sufficiently to perform any operation, but only enough to prevent its relatching upon the arm 556. This can be accomplished by any suitable means such as forming the rear arm of .the power lever 581 as a nose 535 normally spaced a short distance away from a pin 555 mounted on the lower end of a lever arm 557. The arm 587 is rigidly secured to the digitation control shaft '75 and the parts are so formed that when the shaft is in the neutral position in which it is normally held by the centralizer (Fig. 4) the nose 585 is aligned with the pin 556. The end of the nose 585 is normally a short distance away from the pin 586 to permit the lever 55 1 to rock sufficiently to prevent relatching on the latch 556. it will be noted, however, that in the final cycle of the dividend entry operation, when the shaft 75 is rocked by the trigger 479 (see Fig. 4) to cause the plus gears 71 to engage the accumulator gears 85 (countenclockwise rocking of shaft 75 and arm 587 in Fig. 12) the three armed lever 581 will thereupon be permitted, under the urgency of its spring 584, to rock to its fully operative permitted, at this time, to rock 16 position and set the mechanism to be described hereafter.

(c) Initiate dividend entry 0perati0n.Flnally, the forward translation of the link 535 is operative to initiate a dividend entry operation through the conventional dividend entry mechanism already described. This can readily be secured by mounting a bellcrank 5% on the screw 546, adjacent the upper end of the arm 545. The lower end of this bellcrank is provided with a turned-over ear 591 which is opposed by a similar ear 548 formed in the arm 545, the two ears being connected by a suitable tension spring 545 to resiliently urge the bellcrank 5% to rock with the arm 545 as the latter is rocked (counter-clockwise in Fig. 12) by translation of the link 535. The upper arm of the bellcrank 590 is bifurcated, as at 592. This bifurcation engages a pin 593 riveted in the lower end of a short arm 594, the arm 5% being rigidly secured to a transverse shaft 595. The shaft 595, as is shown in Figs. 2 and 4, extends across the machine, the right end being journalled in the right frame plate 21, as shown. At its right end this shaft carries an arm 596 rigidly secured to the shaft. The forward end of the arm 596 overlies a nose 597 formed on the dividend entry key stem 1511.. It is thus obvious that as the link 535 is translated forwardly, the arm 545 is positively rocked (counter-clockwise in Fig. 12), thereby biasing arm 5% in the same direction. Unless prevented by some interlock, the arm 5% will follow arm 545, thereby rocking shaft 595. The rocking of shaft 595, through arm 596, depresses key stem 15].. Such depression of the key stem 151 initiates operation of the dividend entry mechanism, as previously described.

The dividend entry operation includes a shift of the carriage to its extreme left-hand position. In this position the carriage registers are normally cleared, but this prevented in the back transfer operation here described by the disabling of the pusher link 96 through the rocking of shaft 572. After reaching its extreme left-hand position, the carriage is shifted to the right to the predetermined tabulated position, whereupon the dividend entry trigger 479 is released to cause the add gears 71 to engage the accumulator gears 85. Thereupon the machine is cycled to add the keyboard value into the register. However, the keyboard has been cleared by the first depression of the tabulation control key 510, through link 527 as previously described, so that this cycle is an idle one-there being no value standing in the keyboard to be entered into the register. This cycle of operation, however, is valuable as, by rocking shaft 75 and the arm 537 affixed to the left end thereof, it enables the power lever 581 to rock to a fully operative position under the force of its spring 584. The rocking of the lever 531 is utilized to set the mechanism for a subse quent transfer operation as will now be described.

Initiating a transfer 0peration.A link 6% is pivotally connected, as by pin 601, to the lower, or vertical, arm of the three-armed power lever 531. The forward end of the link 600 is pivotally mounted on an arm 603 by any suitable means, such as stud 602. The arm 603 is rockably mounted on a screw 6M threaded into the frame plate 22. The arm 603 is formed as a bail, having two arms 655 and 61d spaced apart to lie on the opposite sides of the pin wheel 615. The inner arm 605 is shaped as shown, and is provided at its free end with a cam face 656 adapted, when the arm is rocked (counter-clockwise in this Figure), to engage a pin 616 in the pin wheel, forcin it outwardly. This arm is preferably provided with a suitable shoulder or notch 607 adapted to engage, at the end of the operative stroke of the lever 581 and link 6th), an ear 658 on the rear end of a stop bracket 65). The free end of the outer arm 610 of the bail 603 is provided with a long nose 611, adapted when in its rocked, or operative, position, to be engaged by the extended pin 616 on the pin wheel 615.

Normally both arms 605 and 610 lie in a position Where they are not engaged by either the pin wheel 615 or the pin 616. However, when the power lever 581 is released by the rocking of the digitation control shaft 75, as heretofore explained, the setting bail 603 is pulled rearwardly (counter-clockwise in Fig. 12). Thereupon the cam face 606 of the inner arm 605 engages the pin 616 on the pin wheel and cams it through the wheel, or to the left. In the rocked position of the setting lever 603, the extended pin 616 will engage the upper, or free, end 611 of the outer lever 610, resetting the control arm 603, link 600 and power lever 58]. to its original, or latched, position. At this time the power lever 581 can be relatched on the shoulder 559 of latch 556, as key 510 will have been released and the mechanism controlled by the key will have returned to its normal position.

The pin wheel 615 is mounted on the left end of the power shaft 63 and is therefore rotated constantly with the operation of the machine. Normally the pin 616 lies in its right-hand, or retracted, position and in that position is inoperative to effect any operation of the mechanism here described. It can be noted at this point that the pin and pin wheel are of conventional construction, in which the pin wheel is relatively thick to form a sufficient bearing for the pin 616. The pin 616 will have a pair of annular grooves formed therein which cooperate with a spring-pressed ball detent 617 mounted in the wheel. Thus the pin is resiliently held in either adjusted position until, on the one hand, it is forced into its outward, or operative, position by the nose 606 of arm 605, or is returned to its inward, or inoperative, position by the cam 623 to be hereafter described.

It will be recalled that the trigger 479 (Fig. 4) is released at the end of the last tabulating shift cycle to rock gate shaft '75 and to throw the digitation control gate into its additive position. Immediately the power lever is rocked by the force of its spring pulling the control arm 603 sharply to the rear to set the pin 616 at the start of the additive cycle. It will be recalled also that in my present invention this is an idle cycle as no value stands in the selection mechanism. The parts are shown in Fig. 12 at the full-cycle position, the pin 616 approaching the illustrated position as the gate shaft 75 is rocked and the pin setting mechanism operated. Immediately thereafter (at the start of the idle additive cycle) the extended pin 616 engages the free end 611 of the arm 610 to reset the control mechanism to its original position.

The continued rotation of the pin wheel 615 and the projected pin 616 is operative to depress the transfer control key This can be secured by the projected pin 616 striking the cam edge 624 on the rearward arm of bellcrank 620, shown in Fig. 12. The lever 620 is pivotally mounted on the frame plate 22 by any suitable means, such as screw 621. The forward end of the bell-crank lever overlies a pin 360 on a nose, or projection, 35% extending from the key stem 351. Thus the rocking of the bellcrank 620 is operative to depress the key 350 and key stern 351 to set the mechanism controlled thereby. lt can be noted that, at this point, the digitation control shaft 75 is in its additive position, and, is conventional of machines of this type, is locked in that position until the end of the current cycle. Thus the forward portion 368a of the yieldable link will be translated forwardly, and locked in the forward position, as heretofore described. However, the rear portion of that link 3360b is locked against movement because the shaft 75 is locked against rotation, the pin 291 (seen in Fig. ll) on lever 280 lying in the upper portion of the triangular cam aperture 382, thereby preventing rocking of lever 330 and movement of link 368b. The link 360a, and the parts positively attached thereto, are latched in the adjusted position by the latching stud 642 on latch slide 640 entering the notch 643 in the forward link 368a.

Shortly after the rocking of initiating lever 620, the

18 projected pin is restored to its retracted inoperative position by a cam face 623 formed on the free end of a bracket 622 riveted to the frame plate 22.

Suitable means is provided for releasing the latch 640 after the idle additive cycle which, as has been explained, is operative to depress key 350. Many mechanisms could be suggested, but I prefer the simple form shown. The pin wheel 615 is provided with a nose 645 which lies approximately behind the pin 616. This nose is adapted to engage the upper edge 646 of the latch slide 640 after approximately 60 of rotation of the pin wheel 615, if the latch is in its upper, or operative, position thereby depressing the latch slide 640 to release the for.- ward link 368a. It can be noted that the operating arm 620 is operated at approximately 150 after the start of of the cycle, by which time the nose 645 will have passed the projected position of the latch slide 640. Thus the latch becomes effective after the nose has passed, shortly after the initiation of the idle additive cycle, and is not released until approximately 60 after the start of the clearing cycle controlled by the transfer control key 350. It can be noted that it is conventional in machines of this kind to provide full-cycle control means, so that the release of the link 368a by the latch 640 at approximately the 60 position of the cycle will be ineffective to terminate the operation before the drive shaft 63 returns to its fullcycle position.

As soon as the additive cycle of the dividend entry operation is terminated, the digitation control shaft 75 is returned to its neutral position by the centralizer (Fig. 4). At this point the arm 380 (Fig. 11) and rear link 36% are released from their locked position. T hereupon the rear end 3681) of the yieldable link is spring-urged under the force of spring 377 to its operative position, as the forward portion 368a of the link is latched in its operative position. Thus the machine, at the end of the idle additive cycle of the dividend entry operation, is immediately thrown into the clearing operation which is utilized to transfer a value from the register into the constant factor storage mechanism mentioned.

Operation It is believed that the operation of the present invention will be readily understood without further explanation. However, it can be briefly summarized by noting that the depression of the tabulation control key 510 IS operative:

(1) To clear the keyboard.

(2) Release the power lever 581 to enable it to drop sufficiently far that it cannot be relatched upon release of the key 510. r

(3) Disable the regular clear clutch control mechanism.

(4) Rock shaft 595 to depress the dividend entry key 150.

The depression of the dividend entry key operates through the conventional mechanism to first shift the carriage to the extreme left-hand position (normal clearing at this terminal position being prevented by the disablement of the clear clutch from the controls normally effected by the depression of the dividend entry key), then shift the carriage to the right to the preselected ordinal position. When this position is reached, the depressed tabulating key 493 is operative to rock lever 492 (as seen in Fig. 2) to depress the tabulation terminating slide 491. The depression of this slide is effective to release the dividend entry trigger 479, which throws the digitation control shaft 75 into its additive position and holds the machine in this position for one cycle of operation. The rocking of the shaft 75 by the trigger 479 is operative to release the power lever 581, whereupon it rocks and translates link 600 and rocks control arm 603. Rocking of arm 603 sets the pin 616 to its projected, or effective, position. This pin setting takes place at the start of the additive cycle of the conventional dividend entry operation. Shortly thereafter the projected pin 616 engages thearm 610 to restore the power lever mechanism to its latched position, the key Slit having then been released by the operator and the linkage controlled thereby returned to its normal position by the force of spring 538. At approximately the 150 position the projected pin will have engaged the bellcrank 620 and rocked it suiiiciently to depress the transfer control key 350. The depression of this key causes the forward translation of link 310 (as seen in Fig. 11) to set the transfer clutch mechanism 263, 261. This can be done as the square shafts 52 are not rotating at this time, there being no value in the selection mechanism to enter into the register. The depression of key 350 also is operative to translate link member 368a forwardly, in which position it is latched by slide 640. Thereafter the continued rotation of the pin Wheel 615 causes the pin to be restored to its ineffective position by engagement with the cam 623. Upon the return of the mechanism to its full-cycle position, at the end of the additive cycle, the digitation control shaft 75 returns to its neutral position, thereupon releasing the rear portion 368]: of the control linkage shown in Fig. 11, enabling the link 3681; to move forwardly. Such movement of member 36812 is operative to rock the lever 380 to cam the digitation control shaft into its subtractive position, and to rock the clear clutch control shaft 103 to cause engagement of the clear clutch. Thereupon the register dials 37 are cleared, transferring the value therein into the square shafts 52 and thence into the storage mechanism described in the copending application.

By means of my invention the operator is enabled to selectively determine Whether to transfer the values standing above the keyboard into the selection mechanism, which he can do by depression of key 359 as previously, or to tabulate to a desired ordinal position, as by depression of the key 510.

I claim:

1. In a calculating machine having a selection mechanism, an accumulator register, a digitating mechanism controlled by said selection mechanism for differentially operating said accumulator register, power means for driving said digitating mechanism, a storage mechanism, and transfer means driven by said power means for transferring values from said accumulator register to said storage mechanism, means for shifting said accumulator register, means for initiating a plural cycle operation of said, shifting means, means including a shift terminating member for terminating said plural cycle operation in a preselected ordinal position of the register with respectto said selection mechanism, a manually operated member for initiating such shifting operation, and means operated by the shift terminating member for initiating operation of said transfer means.

2. In a calculating machine having an accumulator register, a selection mechanism, a digitating mechanism controlled by said selection mechanism for dilferentially operating said accumulator, a factor-storage mechanism, means selectively operable to set the value in the factorstorage mechanism into said selection mechanism, means for shifting said accumulator register through a plurality of ordinal steps, means cooperating with said shifting means for terminating such a shifting operation in any preselected ordinal position with respect to said selection mechanism, and means for transferring values from said accumulator register to said factor-storage mechanism, the combination which comprises a first manually operated member for initiating operation of the means for transferring values, a second manually operated member for initiating operation of said shifting means and conditioning said means for transferring values for operation by the said shift terminating means after the accumulator register has been shifted into the predetermined ordinal position.

3. A calculating machine comprising an ordinally arranged selection mechanism, an ordinally arranged accumulator, a digitating mechanism controlled by said selection mechanism for differentially operating said accumulator, means for shifting said accumulator, means for terminating a shifting operation in any predetermined ordinal position, a value storage mechanism, means for clearing said accumulator, means for connecting said value storage mechanism to the said accumulator during a clearing operation, a manually operated member, a power-operated program mechanism operative to first operate said shifting means to shift the accumulator to a predetermined ordinal position with respect to said value storage mechanism and then operate the connecting means and the clearing means to transfer values from preselected orders of said accumulator into said value storage mechanism, and means operated by said manually operated member for initiating operation of said program mechanism.

4-. A calculating machine comprising an ordinally arranged selection mechanism, an ordinally arranged accumulator, a digitating mechanism controlled by said selection mechanism for differentially operating said accumulator, power-operated means for shifting said accumulator, a value storage register, power-operated means for clearing said accumulator, means for drivingly connecting said accumulator to the said value storage register during a clearing operation, a manually operated member for operating said connecting means and initiating operation of said clearing means to thereby transfer a value from said accumulator into said storage mechanism, a second manually operated memo-er, means operated by said second manually operated member to first initiate operation of said shifting means to shift the accumulator to a predetermined ordinal position with respect to said value storage register and then operate the connecting means and the clearing means to transf r values from preselected orders of said accumulator into said value storage mechanism.

5. A calculating machine comprising an ordinally an ranged selection mechanism, an ordinally arranged accumulator, a digitating mechanism controlled by said selection mechanism for differentially operating said ac cumulator, a value storage mechanism, means for shifting said accumulator to a preselected ordinal position with respect to said storage mechanism, means for clearing said accumulator, means for operatively connecting said value storage mechanism to the said accumulator tiring a clearing operation to thereby transfer a value from said accumulator into said storage mechanism, a manually operated member for operating said connect ing means and said clearing means, a second manually operated member, and a program means operated by said second manually operated member to first operate said shifting means and thereafter operate the connecting means and the clearing means to '[IQBSLEI' values from preselected orders of said accumulator into said value storage mechanism.

6. in a calculating machine having an ordinally arranged keyboard, means for clearing said keyboard, an accumulator, means for shifting said accumulator to a preselected ordinal position with respect to said keyboard, a value storage mechanism, neans for clearing said accumulator, ieans for connecting said value storage mechanism to said ccumulator during a clearing operation, and a manually operated member for operating said connecting means to connect said value storage mechanism to said accumulator and to thereafter operate at cumulator clearing means, the combination which comprises a second manually operated member, means operated by said second manually operated re abcr to operate said keyboard clearing means and said shifting means to shift said occur nator to said preselected ordinal position, and thereafter to operate said first-mentioned manually operated member.

7. In a calculating machine having an accumulator register, a storage register, means for clearing the accumulator register, and means for transferring a value from said accumulator register to said storage register including a clutch for operatively connecting said storage register to said accumulator register during clearing of the accumulator register, the combination which comprises means for automatically shifting the accumulator register to a preselected ordinal position with respect to said storage register, means for selectively determining the ordinal position to which such register is to be shifted, means for terminating operation of the shifting means when the register has reached the preselected ordinal position, and means operated by said terminating means for operating said clutch to thereby connect said storage register to said accumulator register and then operating said register clearing means while the storage register is so operatively connected to said accumulator register.

8. In a calculating machine having an accumulator register, a selection mechanism, a back-transfer mechanism including a factor-setting device and means for transferring the value in the factor-setting device to the selection mechanism, means for clearing the accumulator register, means for shifting the accumulator register with respect to said selection mechanism, and means for transferring a value from said accumulator register to said factor-setting device including clutch means for operatively connecting said accumulator register to said factorsetting device during operation of the clearing means, the combination which comprises means for continuously shifting the accumulator register in a preselected direction, means for terminating operation of said shifting means when the register has reached a preselected ordinal position, and means operated by said terminating means for operating said clutch to thereby connect said factor-setting device to said accumulator register and thereafter for operating said register clearing means while the factor-setting device is so operatively connected to the accumulator register.

9. A calculating machine comprising an ordinally arranged accumulator, means for shifting said accumulator, means for terminating a shifting operation in a pre determined ordinal position, a selection mechanism, a digitating mechanism controlled by said selection mechanism for differentially operating said accumulator, a

factor-storage mechanism, means for selectively inserting values from said storage mechanism into the selection mechanism, means for clearing said accumulator, means for connecting said factor-storage mechanism to said accumulator during a clearing operation, a manually op erated member, and a program means operated by said manually operated member to first operated said shifting means to shift the accumulator to a predetermined ordinal position and thereafter to operate the connecting means and the clearing means, thereby transferring values from preselected orders of said accumulator into said factor-setting mechanism.

10. In a calculating machine having an accumulator register, a selection mechanism, a digitating mechanism controlled by said selection mechanism for differentially operating said accumulator register, a factor-storage mechanism, means selectively operable to set the value in the factor-storage mechanism into said selection mechanism, means for shifting said accumulator register, means for initiating a plural cycle operation of said shifting means, means including a shift terminating member for terminating said plural cycle operation in a preselected ordinal position of the register with respect to said selection mechanism, and a transfer means for transferring values from said accumulator register to said factor storage mechanism, the improvement which comprises a manually operated member for initiating such shifting operation, and means operated by the shift terminating member for initiating operation of said transfer means.

References Cited in the file of this patent UNITED STATES PATENTS 1,590,920 Wernecke June 29, 1926 2,173,635 Pott Sept. 19, 1939 2,228,035 Pott Jan. 7, 1941 2,399,170 Chase Apr. 30, 1946 2,403,273 Friden et al. July 2, 1946 2,531,208 Gang Nov. 21, 1950 FOREIGN PATENTS 213,464 Switzerland May 16, 1941 214,217 Switzerland July 16, 1941 218,923 Switzerland Sept. 16, 1947 

